Turret-slide-operating mechanism for automatic turret-lathes.



LQCQL Parteute Got. 8, 1912A 4 SHEB'lS--SHEET 1.

wi, {f1/woon s F www J. C. POTTER. TUBRBT SLIDE OPERATING MEUHANSM POB. AUTOMATIC TUBBBT LATHES. APPLIUATIOH rxLnD 12.21.31, 1011.

Patented 0G13. 8, 1912.

4 mums-SHEET 2.

vwm/l for J/'/Q J. C. POTTER. T'URRET SLIDE OPERATING MBCHANISM FOR AUTOMATIC TURRET LATHBS.

APPLICATION IXLBD JMLSl, 1911,

Patented Oct. 8, 1912.

1 SHBBTB'SHEET 3.

J. C. POTTER.

TURRET SLIDE OPERATING MBOHANISM POR AUTOMATXU TUBBJJT LATHES.

APPLICATION FILED JAN.31, 1911.

'wanted Oct.

4 SHEETS-SHEET Q1.

TURRET-SLIDE-OPE'RATING MECHANISM FOR AUTOMATIC TURRIST-LAIH'ES.

Specification of Letters Yatcnt.

lfnlontcdilct. t, MM2.

Application lezl January 31, 1911. Serial No 605.318.

To allwhofrn it may concern:

Be "it known that I, JAMES C. Porras, ol Providence, in the county ot Providence, and.in the "State of Rhode Island, have invented ay certain new and useful Improvement in Turret-SlidesOperating li/Iechunism for Automatic Turret-Lathes, and do hereby declare that the 'following is a full, clear, and exact description' thereof.

In automatic turret lathes, as commonly constructed, in which the reciprocation of the turret slide is produced by a cam device, a revolving drum has been employed having attached to its periphery series ot cam plates. For each turret tool a pair of cam plates is required, one acting to more the turret slide in one direction and the other in the opposite direction. There are certain important practical objections to this cam drum arrangement which of necessity inhere in the construction, such for example, as great diameter of the drum and the difficulty of use of an angle of cam lfaces which will easily impart the desired longitudinal movement to the turret slide.

The object of my invention is to provide turret slide moving `means which will be free from the practical objections noted and which Will result in other important advantages to machines of the class to Ywhich my invention pertains.'

To the 4end, therefore, of Vproviding important improvements in the art olf automatic turret lathes, my invention consists in the mechanism constructed substantially as hero-- inafter specified and claimed.

In the accompanying drawings-Figurc 1 is a View -partly in side elevation and partly in longitudinal section ot' an auto matic turret lathe embodying my invention;

Fig. 2 a rear elevation of a portion of thel machine, the head stock end being omitted; Fig. 3 an end elevation; F Il a detail view showing the cam drum reversingr mechanism.

In the embodiment of my invention illustrated in the drawings, I show an automatic turret lathe which comprises a, chucl: carrying spindle A mounted in bearings upon the head stock on a frame 10, a turret slide B reciprocable toward and from the chuck in Ways on the frame 10 and a cross slide C mounted on the :frame l0, all of which parts may be ot usual or any desired construction. I-ower to operate the machine is applied to a band Wheel D on a main dri ving shaft E. Suitable trains of gearing, not

necessary to be described, transmit motion trom the main driving shall to the spindle di and also to a feed slmtt ll located at the roar of the machine trom which shaft power is taken by suitable gearing' to revolve the cross slide reciprocating cam drum l2 and a speed and toed mmlrolling dog wheel 13 as well as the turret slide reciprocating cam drum li/l.

rl`hc turret slide operating cuni drum llfl is ot' cylindrical 'lorm and in its periphery it has a cam groom` or slot that traverses in a substantially spiral or helical course the drum from end to end and terminating at each ond in a portion that is at right angles to the drum axis, so that when the usual turret slide stud or roller l5 is in engagement with such portions no movement of the turret slide will take place, but movement is imparted to the turret slide only when the turret slide roller or stud is being. acted upon by the intermediate obliquely extending portions ci said cam groove. As must be evident to ell'ect the movement of the turret snide alternately in opposite directions, the direction of revolution ol' the cam drum l-l must be reversed. inasmuch as the continuous substantially spiral or helical 't'crm ol." cum frrooi'e enables any number ot revolutions ol the drum Il in a given direction to impart movement to the turret slide in one directiom it will he seen that according to the nulnber of revolutions which it may be deemed desirable to impart to the drum, its diameter can be comparatively small, and any reduction in diameter being compensated tor by increase in length of the drum it will bc apparent that since increase in length oi: the drum is unolijectionuble as compared with increase in diameter of the drum (which increase in dian'ieter means increased height of the mechine) my new construction ol drum is o marked superiority over the common type hereinbefore rcl`erred to. been se, with the same angle of :am a drum oi much larger diameter is rc quired than mine. `With my new construe tion without any substantial increase in diameter, l can give less obliquity or inclina-ll tion to tho rain so as to secure an easier action thereof on the turret slide.

The cani drum la', which as a mailer of cmivenicnce ot' mnsl'ruction may be ol" several sections is mounted upon ashait l5 f-mpfnn'ted in suitable bearings in the frame l() and at its inner end there is a gear lil keyed to the shaft to revolve thessnne and the drum with which meshes a pinion 1T on :i short shaft i8.- oose on the 18 there are two gears 19 and 520, respec;

@i tively, either of which at a time may he clutched to the shaft l? so es to revolve the shaft 17 in either direction .find thus revolve the drum 14 in either direction. The gesti* l!) n'ieshes with :i gear 2l on the feed shaft m 11. so that the gear 1f) thus receives motion from the feed shaft ll in one direction and the gear 20 snes-hes with a pinion 22 on a short 23 having n pinion %fwhich meshes with the feed shaft, pinion Q1 and l thus the gear 20 is revolved 'from the feed shaft in the opposite direction from the direction of revolution oit the gear 1S),

lt Will, therefore, he evident that by the alternate clutching of the gears i9 and 20 to the shaft i8, the cam drum 14 Will be revolved in one direction or the other from the feed shaft l1. Y I l Situated between the two` gears 193ml 20 on the shaft 18 is :i doiible clutch..coi.iar 25 25 which is applied to the shaft 18and is engaged by a yoke 26 on a rock sh'aft 27 that extends from front to back of the machine so that by the oscillation of said rock shaft Q? one gea/r or the other may bel clutched to the shaft 18 and thus .the direction of revolution of the cam drum le determined. On the endiof the rock shaft 27 at the front or" the machine is a crank arm i8 that engages an annularly grooved spring pressed collar 29011 e longitudinally reciprocating rod or plunger 430 slidohly supported in o box or bracket 3l secured to the machine frame 10, Within which box 31, and encircling e portion of the rod 30 therein, is a coil spring 32 which bears upon one end of the shoulder of the rod 30 and tends to move the rod in :i direction to rock the shaft- 2? in the direction to throw the clutch collar 25 into engagement with the gear 20. iVhen the 4,5 rod 30 is moved in the direction in opposition to the spring 32, the clutch collar 25 isl thrown into engagement with the gear 19 and when such is 'the cese the clutch opera-ting rod 30 is hitched in position against the pres- 5o sure of its spring 32 by e spring pressed leech holt 33 extending transversely ot' the rod 30 in the looX 3l which latch 33 has :i nose that engages e shoulder 3e onA the heed of the rod 39. The head of the rod 30 hes e bevel nose.

35 which' projects beyond the box 31 in the path of a cern plete 36 projecting from the periphery of e, Wheel or disk 3? which is secured to e shei't 3S that extends 'frolntront to rear of the machine end :it the heel: o' e0 the machine hes keyed to its Worin gear ,39 which meshes with n worm den n shaft stl which. is on extension or prolongation o? the pinion shaft 23 which i'eceii-'es its niotion in the feed shot" ji. lt ivill tlins oe eti seen that the carrying iiislf. or' wheel il? incensi.

receives its motion from the feed shaft ll' end thus the movement ot the rod 30m the direction to throw the clutch 25 into `posi-k tionor the forward feed rotation of thedrnm M is produced from the feed sha-ft 1i. Vgo The clutch throwing disk or Wheel 37 rotates 'continiiously in the seme direction.

The reversal of thel direction of revolvesA tion ci the drum Hvfor the return andthe turret revolving motion of the turret slide is' 75 accomplished by devices -that receive their movement from the drinn 1li, so es to make it oer/tain that the feeding revolution of the drinn will alrgejis he stopped at exactly' the sai-me lifiositioi'i of the drum, the stoppage@ of 30 ythe drinn preliminary to the reversal of its 'revolution occurring prefersblyio' o oriejtb inteirvol before thereversal of revolution of the drum before ncturn mot-ion of the turret slide takes place. To accomplish this result-` a gear Wheel 42 is ineshed withthe drum gear 1G and upon the shaft 43 carrying the gear 42 is a bevel; pinion it which meshes with a bevel gear 45 upon a hollow shaft 46 placed concentric with the disk shaft 38, and. on said hollow shaft 46 at the inner side of the disk 37 is a radial linger or erm 47 Whose outer extremitfyis adapted by the revolution of the finger or a'rm to engage the outer end of the latch 33 which holds the clutch operating rod 30 against the movingtendency of the spring 32 and tl'iereb'y the latch. 33 is moved to release the rod 30 and permitjits actuating spring 32 to act. As the drum 40 *reverses its, direction of revolution7 the releasing erm 47, of course oscillates and its path of movement is from the lat-ch engaging position indicated in dotted linesv infFig. 4 to the position shown in full lines in Fig. l which .is enough less than a complete revolu# tion to avoid contact with the box orbracket 31. .As hos just been above pointed out, there is en interval of rest zitter the stoppage of the drum before the return motion takes place and to secure such stoppage of the drum 1d, both gears 19 and 2() must be nn-` clntched from theshzitt 18 which, of course, is accomplished hy., the movement of the clutch collar 25 to o midposit-ion Where it will engage neither gear, and this result is secured by permitting the clutch operating rod 30 when its latch 38 is released to move only o port of its throw under the pressure of its speinf 3&2. "lo obtain such limited movement o' the clutch rod 30, the'disk or Wheel 3? hes at e, point d inmetricftlly oppo-x site the com 36 a radial projectionor lug 48 which is contig/"mms to the inner or nose end of the rod 3G when the latch 32 is disengaged from seid rod, s so long as there is contact 'between said nose and said projection 48, the clutch collar 215 is maintained in its position, and no motion ot the com drinn i4 takes place. soon, however, as hy the contim ucd revolution ot' the disk 3'? o projection 48 pzissesont of Contact with the nose end o'l" the rod 250, the latter is moved its full (iistanee under tho pressure o't the spring 3Q and the clutch eoliani thrown into engagement with the Q-enr 2t), and the reverse revolution of the drum lli takes plaire for iimpnrtinv' the return :incl the tnrrnt revoir# groove that are engngedrby the turret; slide stud when shifting oit-'lite clutch from engorgement with one ot the ge rs on shnt't '17 to the other takes piace, and hence the ilrinn is not meting on the slide sind under strain 'from that muse. From this it follows tlnitthe shitting of trlnclutch takes pince under conditions oi' eonsifiernhie reduction otE Strain or 'pressure on the clutch as com bijiietl Wittih what would he ihe ense, were ihe drinn doingf work at the time ot shifting oi' the clutch.

As the reversing ot' the rewlution ot the drum is controlled hy tho rlisk 3T whirh receives its motion from the feed shntt. il, such nfcv'ersnl certain to occur zilwnys in proper! time relation with the Cross sli lr (Y inni the fling wheel t3, heenuse tho (f1-nsw siii-io drinn if: anni the (log wheel 13 also receive their -rnot'inn iront the feed shaft 1.1. The cross niide tools, it 'muy ho remarked, perform their u'infn hiring-1' thedwell which results 'from the. 11n-usenet: ot' the turret slide stud in ille hnniis ot the umn groove or drinn 1.4i.

The one ouin grow/e of the lrnln l-l i'neipiocntes the turret slide tor euch tool or stntioi; ot the turret anni the rinn flrinn n'niites, in tho machine illustrated, two rovolntions for each tool, one revointion 'tor he zn'ii'fnice nnwenient ot." the tool und the other revotution 'for its return movement. Vnrintions of feed are .secured by varying the Speed of revolution of the. feed shaft 'l1 b y automatic mechanism such as that which is the subject of my pending npiiilicntion for patent No. (305,817, iiiecl Jun. 311, 1911.

:Having thus described my invention what claim i5- l. In n turret intim, the con'itiinntion of n 'turret slide, and a slide reciiiroonting drinn having a single 13am. of :i helical or suhs'tnntiaiiy helical iior'ln extending: more than one turn around the drum with u termi? portion at right angles to the axis.; otY i:` revolution of the drum, such termnnil pon tion being zitI the end of the mini where the Completion of the tnoht'eediing' movement ooenrs, und nieznis to reverse lln ilirertion ot revolution oi" the flrinn ntter the` runnennngingr Inen'iher otv the sliihl hunl entri-ed into engngement with sziiii terniinzil portion.

if. in :i turret Inthe, the combination ot :i turret sinh?, n siiile reciprocating (lrinn hui'- ing;- :t single cani n? :i helifnl or substantially helirnl torni extein'lingf more thun one turn :i1-ouml the (h'in'n with terminal portions nt' right :ingles to the axis, ot revolution ot' the, drinn. :noti nii-:ins to reverse the lirertiion ot' revolution o't thil (lilnn nt nach reriprorntion or" the slide.

i5. In n turret' inthe. the ronlliinzition of :i turretl slide. und n slitte reriin'o 'ating f lrnin linvinp; :L singin cuni of n helirnl or sul)- stnntiiilty"helirnl forni extending more tlnin one turn zirounii the (hnni with :i terniinni portion tit right :ingles to the axis of the revolution of the drinn. such terminali portion iii-ingr :it the enti oi the Lenin where the completion ot" tht` toolieiniing movement oecnrs, means to reverse the iiirertion of revoiution of the (li-uni n'liter the rannmngrnifing meinhnr oi the siii'io has entered into riiinigoineni: with snirl terniinnl portion, :i cross slide, rross slide moving nierlnniisnl. :nul n ennn to Utilise the reversal o'l1 revolution ot tio drinn in n pre:leterniinmi time relation to the mnvmnents ntf tlnl cross nliiie.

Ai. In i turret lathe, the voniliinniion ot' :i turret slide, n reversible slide i'eriproi-:itiing ilrnn'i, n t'eefl shzitt greni'inl to the (li-uni, ziutiinmtir rewrsianr meehzniisin, unil :into ninthl menns nontrolline' the rrrenng inertiA :mism geared to the teeil sshni't'.

ln n turret lntlnl` the rnnihinution ot :t turret slide1 n reverslilr sliile reeil'n'ot'nting; firuni, :i 'feed shniii geuren-l to the il1nin,.iuto nizitio stopiiing :unl reversing mechanism, :unl ntltonmtie means Controlling .sind stopping;A sind rfwin'sing nierhnnisln gezlljerl to the iirum anni to the teerl shn'tt, respectively.

t3. in n turret inthe. the combination o'l` '.1 turret siliile, zi reversible slide reriprorntini drinn, n 'feed :ihn tt:` grrnring liet-Ween tho tfeell shntt und sziirl drum t'or rm'oiving the drinn in either direction, reversing mechanism, means forcontrolling the reversing.: meeh- :inisin receiving motion Jtroni the feed shaft, n Cross slitte, und n power connection hetwren the feed shaft and the cross slide.

I7. in n turret' inthe, the combination of :i tnrrelt slide, :i reversible, slide reciprocnting drinn, n 'feed shut't; gearing between thev feed slinitt'y and suini drinn for revolying the drum in 'either direction, reversing mechanifnn, inenns'for controlling the reversingr meeh- :niisnl receiving motion from ihn leeft shaft', :i cross slide, n pownr ennnrriinn hetweei'i the, tieeil shut't nini the orosws siitln, n speed chung:- ing ting wheel, und gearing between said dog Wheni und sziid feed shzift.

8. :in a turre ache, the eombineion e an turret slide, a sde l'ecipreeatng (imm, a feed shaft, gearing between the feed shaft and the drum, means to ste the revolution of the drum, automatic mens for controlling the drum soppng means, deriving motion from the drum.

9. 1n a turret athe, the eombinetono a, turret slide, a Slide` reciprocating Qfim hav ing an actuating eem, e feed shafta tw'e trains of gears connecing the feed shaftand the drum for revevnfg the drlgm in 0ppm site directions, e clutch conrolkmg said two trains ef gears, a reciprocating cueh operating rod, e 'latch im' holding seid rod in ene possezn, a, liek geared eo he 'eef Shaft having cams arranged 3fm' sueeeseve e0- opex'aion with said dutch ope'e'tng red, (me of seid cams acting in move the rod in une direction and the @they acting to mt its movements in "the eppeste direction, and 

